preflex beam

例句：

1. 1.The preflex beam is used to support the roof of the building during construction.
   预弯梁用于建筑施工期间支撑屋顶。
2. 2.The preflex beam was designed to withstand high winds and heavy snowfall.
   预弯梁设计用来承受大风和大雪。
3. 3.The preflex beam was installed in the bridge to improve its stability and durability.
   预弯梁被安装在桥梁上以增强其稳定性和耐用性。